OCO-3 Level 1B calibrated, geolocated calibration spectra, V10 (OCO3_L1B_Calibration) at GES DISC

Version 10 is the current version of the data set. Older versions will no longer be available and are superseded by Version 10.

The Orbiting Carbon Observatory -3 (OCO-3) was deployed to the International Space Station in May, 2019. It is technically a single instrument, almost identical to OCO-2.

The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere.

The OCO-3 incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 micrometers and in molecular oxygen (O2) A-Band at 0.76 micrometers. The three spectrometers have different characteristics and are calibrated independently. Their raw data numbers (DN) are delivered correlated in time to the Level 1B process as Level 1A products. Each band has 1016 spectralelements, although some are masked out in the L2 retrieval.

This L1B product results from calibration mode measurements (e.g., Lunar,Solar, Dark observations), and thus it differs from the OCO3_L1B_Science (L1bSc) product. The differences in the product formats are only in the geolocation information provided. Whereas the L1bSc products report geolocation data for each sounding, calibration products report the direction of the boresight vector.

Data and Resources

Additional Info

Field Value
Maintainer ANDREY SAVTCHENKO, PH. D
Last Updated March 31, 2025, 20:45 (UTC)
Created March 31, 2025, 20:45 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation OCO-3 Science Team/Michael Gunson, Annmarie Eldering. 2021-07-29. OCO3_L1B_Calibration. Version 10. OCO-3 Level 1B calibrated, geolocated calibration spectra, V10. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://disc.gsfc.nasa.gov/datacollection/OCO3_L1B_Calibration_10.html. Digital Science Data.
creator OCO-3 Science Team/Michael Gunson, Annmarie Eldering
data-presentation-form Digital Science Data
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/OCO3.jpeg
harvest_object_id 3e6b5b3f-89b7-4316-bb70-035b3c994037
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C2074239073-GES_DISC
issued 2021-07-21
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C2074239073-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2021-07-21
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name OCO3_L1B_Calibration
source_datajson_identifier true
source_hash b3097ba1c03abb96a27af7beffd220911ce8e4c776494b96d7008c34f1027aec
source_schema_version 1.1
spatial -180.0 -53.0 180.0 53.0
temporal 2019-12-17T00:00:00Z/2023-02-28T00:00:00Z
theme {OCO-3,geospatial}